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Configuring an MBGP route reflector
To guarantee the connectivity between multicast IBGP peers in an AS, you need to make them fully
meshed. However, this becomes impractical when large numbers of multicast IBGP peers exist.
Configuring route reflectors can solve this problem.
In general, it is not required that clients of a route reflector be fully meshed. The route reflector
forwards routing information between clients. If clients are fully meshed, you can disable route
reflection between clients to reduce routing costs.
In general, a cluster has only one route reflector, and the router ID of the route reflector identifies the
cluster. You can configure multiple route reflectors to improve network stability. In this case, you need
to specify the same cluster ID for these route reflectors to avoid routing loops.
To configure an MBGP route reflector:
Step Command
Remarks
1.
Enter system view.
system-view
N/A
2.
Enter BGP view.
bgp
as-number
N/A
3.
Enter IPv4 MBGP address
family view.
ipv4-family multicast
N/A
4.
Configure the router as a
route reflector and specify an
MBGP peer or a peer group
as its client.
peer
{
group-name
|
peer-address
}
reflect-client
Not configured by default.
5.
Enable route reflection
between clients.
reflect
between
-
clients
Optional.
Enabled by default.
6.
Configure the cluster ID of
the route reflector.
reflector cluster-id
cluster-id
Optional.
A route reflector using its router ID
as the cluster ID by default.
Displaying and maintaining MBGP
Refer to the following information for details about displaying and maintaining MBGP.
Displaying MBGP
Task Command
Remarks
Display the IPv4 MBGP routing
table.
display ip multicast routing-table
[
verbose
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any
view.
Display the IPv4 MBGP routing
information matching the
specified destination IP address.
display ip multicast routing-table
ip-address
[
mask-length
|
mask
] [
longer-match
] [
verbose
]
[
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any
view.
Display MBGP peer group
information.
display
bgp
multicast
group
[
group-name
] [
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any
view.
Display the advertised networks.
display bgp multicast network
[
|
{
begin
|
exclude
|
include
}
regular-expression
]
Available in any
view.
Display AS path information.
display bgp multicast
paths
[
as-regular-expression
|
|
{
begin
|
exclude
|
Available in any
view.
